Joining strip for use in building

ABSTRACT

AT THE JUNCTION BETWEEN A FLAT ROOF AND A WALL EXTENDING UPWARDLY FROM SUCH ROOF, AN UPTURNED EDGE OF ROOF COVERING, SUCH AS THE ROOF SKIN OR FLASHING OVERLAPPING THE ROOF SKIN, IS SECURED IN PLACE BY ATTACHING MEANS INCLUDING A CONNECTING STRIP HAVING A MAIN WEB MOUNTED IN A PLANE PARALLEL TO THE UPRIGHT WALL FACE, A MASKING WEB PROJECTING OUTWARDLY FROM THE UPPER EDGE OF THE MAIN WEB AND A FLANGE PROJECTING OUTWARDLY FROM THE LOWER EDGE OF THE MAIN WEB. THE ROOF COVERING EDGE   IS HELD IN PLACE BETWEEN THE MASKING WEB AND THE LOWER FLANGE OF THE CONNECTING STRIP BY A RETAINING STRIP. THE MASKING WEB IS SHAPED SO AS TO BE INCLINED FIRST UPWARDLY AWAY FROM THE MAIN WEB AND THEN DOWNWARDLY AWAY FROM THE MAIN WEB TO CONSTITUTE A RAIN BACKWASH-PREVENTING PROFILE.

Feb. 16, 1971 K. 66am. 3,562,971

JOINING STRIP FOR USE IN BUILDING Filed Aug. 2, 1968 5 Sheets-Sheet 1 Tiff-' I] 12 [5 247 I I0 2/ 9f 5 5 x 7 6 Feb. 16, 1971 K. GOBEL.

JOINING STRIP FOR USE IN BUILDING 5 Sheets-Sheet 2 Filed Aug. 2, 1968 Pd). 16, 1971 Q E JOINING STRIP FOR USE IN BUILDING 5 Sheets-Sheet 5 Filed Aug. 2, 1968 United States Patent 3,562,971 JOINING STRIP FOR USE IN BUILDING Klaus Giibel, Zeughausstr. 41, Trier, Germany Filed Aug. 2, 1968, Ser. No. 749,788 Claims priority, application Germany, Aug. 4, 1967, P 16 59 311.6 Int. Cl. E04d 13/14 US. Cl. 52-60 6 Claims ABSTRACT OF THE DISCLOSURE At the junction between a flat roof and a wall extending upwardly from such roof, an upturned edge of roof covering, such as the roof skin or flashing overlapping the roof skin, is secured in place by attaching means including a connecting strip having a main web mounted in a plane parallel to the upright wall face, a masking web projecting outwardly from the upper edge of the main web and a flange projecting outwardly from the lower edge of the main web. The roof covering edge is held in place between the masking web and the lower flange of the connecting strip by a retaining strip. The masking web is shaped so as to be inclined first upwardly away from the main web and then downwardly away from the main web to constitute a rain backwash-preventing profile.

The covering skins of flat roofs, where the latter butt against an upright wall face ascending from the roof, which usually is masonry or brickwork, have hitherto generally been fastened by drawing it up the wall face a short distance and bonding, nailing, screwing or otherwise fastening it to the brickwork. Use is then made of a flashing which is let into the ascending brickwork and overlaps the upwardly directed edge of the drawn-up roof sheathing. In order to provide for ventilation of the roof structure, in many instances an angled plate is bonded between the sealing layers and projects upwards past the rising part of the lateral seal.

In practice, the known conventional jointings or attaching means have various grave disadvantages. The rigid attachment involved does not allow expansion or contraction of the individual components, without incurring damage on the roof-covering skin. It is, however, known that changes in atmospheric conditions result in movement of the roof components, which may, depending on the coeflicients of expansion of the components, result in the components moving relative to one another. It is therefore a practical necessity to provide, for the roof covering skin, a connection with the adjacent masonry which allows the roof skin to be movable within certain limits. There exists, furthermore, in the case of the known joining strips, the disadvantage that, more especially if roof ventilation is provided for, they do not have a rain backwash-preventing profile, so that rain water impinging on the strip from the outside can get under the roof skin. Furthermore, the installation of the known connection profiles is comparatively diflicult and time-consuming.

The invention provides attaching means for use in connecting a drawn up edge of the covering skin of a flat roof, or a flashing overlapping the skin of such a roof, to ascending masonry having a face forming an upright Wall face abutted by said roof, in the form of a profile connecting strip shaped to provide a main web intended, in the installed condition of the strip, to lie in a plane parallel to the upright wall of the masonry, a masking web projecting forwardly from the main web and having a depending flange along its edge remote from the main web, a retainer formation disposed beneath the masking web and adapted to receive a retaining strip which serves to retain the skins edge or the flashing in the strip, char- Patented Feb. 16, 1971 ice acterised in that the masking web, in its region towards the main web, is inclined firstly upwardly away from the main web and then downwardly away therefrom, to constitute a rain backwash-preventing profile.

The arrangement conveniently includes mounting brackets serving as distance pieces for mounting the strip on the masonry so as to be spaced therefrom, the masking web engaging into the brackets.

In the preferred embodiment there is also a shielding strip which clamps onto the mounting brackets and includes forwardly and upwardly, and forwardly and downwardly inclined surfaces above the rain backwash-preventing profile.

The retainer formation may conveniently serve to retain, in the profile connecting strip, clamping dogs which are staggered relative to one another and serve to impart an S-shaped curvature to the skin or flashing retained therein.

A detent for locating the retaining strip is conveniently provided at the lower edge of the main web.

The invention will be described further, by way of example, with reference to the accompanying drawings. FIGS. 1 to 14, inclusive, are vertical transverse sections through different embodiments of the attaching means of the invention.

Referring to FIG. 1, a joining strip arrangement for fastening an upturned edge of roof covering, such as sealing skin or a roof flashing strip 1, at the junction between a fiat roof and the upright face of a wall adjacent to and above the roof, such as rising masonry 4, comprises mounting brackets 2, which can be fastened by means of nails or the like 3 to the ascending masonry 4. A profile connecting strip 5 into which, in its turn, a retaining strip 6 can be clamped, is clamped onto the mounting brackets 2 which are spaced apart from one another and are all on the same level. The retaining strip 6 is held in the profile connecting strip 5 by means of locking wedges 7. Furthermore, arranged on the mounting brackets 2 is a shielding strip 8 which masks or shields the profile connecting strip 5 from above.

The profile connecting strip 5 is shaped to provide an upright inner or main web 9 which extends generally parallel and adjacent to the outer upright wall face of the masonry 4. In the example of FIG. 1, this inner or main web 9 is joggled along its centre, away from the outer upright wall face of the masonry and has a dovetail slot 10 therealong. Along the lower edge of the main web 9 there is a clamping lip 11. Furthermore, projecting from such lower edge and away from the ascending brickwork 4 is a ledge 12 which carries on its front edge an upwardly and downwardly extending flange 13.

On the upper end of the main web 9 there is a masking web 14 which projects away from the masonry 4 and is shaped, near to the upright wall face of the ascending masonry, and therefore in its region towards the main web 9, to form an upwardly projecting protrusion or extension 15 bevelled to the front and rear, that is to say it is inclined first upwardly away from the main web 9 and then downwardly away therefrom. The front edge of the masking web 14 is formed with a depending flange 16. This flange 16 has, on its inner face, a clamping dog 17. A further clamping dog 18 is arranged on the inner face of the main web 9. The extension or protrusion 15 constitutes a rain backwash-preventing profile of the joining strip, and the clamping dogs 17 and 18 constitute a retainer formation, beneath the masking web 14, of such joining strip.

The profile connecting strip 5 is seated on cleats 19 which are arranged in the slot 10. By use of nails or the like 3, these cleats 19 can be fastened directly on the ascending masonry 4 or they can be fastened thereon in conjuncation with the mounting brackets 2. When the mounting brackets 2 are used they serve also as distance pieces making possible ventilation of the roof covering skin. The cleats 19 are advantageously arranged in such a way that they permit movement of the profile connecting strip 5, without giving rise to stresses and prevent displacement of the parts of the joint relative to one another.

Each mounting bracket 2 consists of an angle piece with a vertical part 20 and an angled part 21. The angled part 21 has a protrusion 22 including forwardly and upwardly and forwardly and downwardly inclined surfaces above and corresponding to the extension 15 and into which the latter engages. The shielding strip 8 can be clamped onto the parts 21 of the brackets and this strip 8 is, in its turn, designed as at 23 to correspond with the protrusions 15 and 22 of the profile connecting strip and of the mounting bracket. The protrusion 23, formed in this way, of the shielding strip 8 serves as a rain backwashpreventing profile, a function which is served by the protrusion when the joining strip is used without the mounting brackets and the shielding strip 8. The rear edge 24, of the shielding strip -8 projecting downwardly towards the masonry 4, carries a packing 25 which provides for sealing the shielding strip relative to the masonry 4.

The lower part of each of the mounting brackets 2 is formed with a clamping member 26 over which the lip 11 of the profile connecting strip 5 engages and against which the flange 13 abuts. In addition, a recess 27 for a nail 28 serving to fasten a wood lath 29 can be arranged on the lower end of each of the mounting brackets 2.

The retaining strip 6, which can be clamped into the profile connecting strip 5, serves for retaining the drawnup edge of the roof sealing skin 1 in the cavity of the strip 5. As shown in FIG. 1 the roof sealing skin 1 is held in such a way, by dogs 16 and 18 arranged in the profile connecting strip, as to assume a somewhat S-shaped curvature around the retaining strip 6, so that it can not be readily pulled out of the profile connecting strip cavity whilst expansion and contraction within certain limits is possible both for the roof skin 1 and for the individual parts of the joining strip.

Despite this advantage, the joining strip can be installed easily and rapidly. The individual parts are held, without special screwed joints, only by clamping. The roof skin does not need to be cut off exactly to length, and unintentional withdrawal of the retaining strip is prevented. Where the mounting brackets 2 are used ventilation of the space beneath the roof skin is possible. The rain backwash nose 15 or 23 prevents rain water from penetrating under the roof skin.

In installing the roofing edge-attaching means the brackets 2 are first secured in the proper position to the face of the upright wall by the lower nails 3. If the installation is such that the profile connecting strips 5 can be slid lengthwise along the wall, the brackets 2 can further be secured by the upper nails 3 also, which pass through the cleats 19 to secure them in place at the same time The profile connecting strip 5 is then slid horizontally lengthwise to fit its dovetail slot 10 over the cleats 19. Alternatively, the cleats 19 can be slid into the dovetail slot 10 before the profile connecting strip is put in place, then the profile connecting strip can be raised into place and the upper nails 3 driven through the cleats 19 and mounting brackets 2 to secure such cleats and profile connecting strip to the wall face at the same time.

Next, the upper edge portion of the roofing sheet or flashing 1 is folded around the retaining strip 6 in the manner shown in FIG. 1, and this strip is tilted and its curved edge is inserted into the upper channel of the profile connecting strip 5. The outer edge of the retaining strip can then be swung downward to place the retaining strip and roofing edge portion in the relationship to the profile connecting strip 5 shown in FIG. 1. By lifting the lower portion of the roofing away from the wall the 4 locking wedges 7 can be inserted between the profile connecting strip flange 13 and the lower portion of the retaining strip 6 to secure the retaining strip in place relative to the profile connecting strip.

Finally the rear edge 24 of the shielding strip 8 is inserted horizontally above the upper protrusions 22 of the mounting brackets 2, and then the shielding strip is swung downward into the clamping relationship with the parts 21 of the brackets, as shown in FIG. 1.

The specific embodiment shown in FIG. 2 differs from that of FIG. 1 chiefly in the form of the retaining strip 30, which in this case can be fastened to the profile connecting strip 33 by means of a supporting arm 31 and a fastener 32. In this embodiment, the profile connecting strip is formed with dogs 34 to impart a multiple curvature to the roof skin or flashing (not shown) such that it cannot slip out, whilst lateral freedom of movement is possible. Also, rain backwash-preventing profile 35 is provided. Naturally the profile connecting strip 33 can, in the same way as the strip 5 of FIG. 1, be mounted on the ascending masonry with or without mounting brackets.

In the specific embodiment shown in FIG. 3, instead of there being blocking wedges 7 as in FIG. 1, a clamp strap 37 which assures that the retaining strip 36 seats securely within the profile connecting strip 38, is arranged on the retaining strip 36.

FIGS. 4 and 5 show exemplified embodiments which require the presence of mounting brackets 39 or 40. In these cases, retaining strips 41 or 42 are provided within the profile connecting strips 43 or 44, which impart corresponding curvatures to the roof skin or flashing. In the construction of FIG. 4, a shielding strip profile is also provided. In these specific embodiments, rain backwash'preventing profiles are present as at 46 and 47.

The embodiments shown in FIGS. 6 and 7 comprise profile connecting strips 58 or 59, which correspond substantially to the form shown in FIG. 1, and in each of which are retaining strips 60, 61 or 62, 63, whose clamping parts match one another. The construction of FIG. 6 has, in addition, the advantage that the retaining strips are completely alike, so that in this case two clamp rails of exactly the same kind can be used. For ensuring efiicient roof skin retention, clamping dogs 64 are provided on the ends of the clamping parts. In both cases there is a rain backwash-preventing profile 65 analogous with those of previous embodiments. The specific embodiment of FIGS. 6 and 7 can be mounted on the masonry with or without mounting brackets.

The specific embodiment shown in FIG. 8 resembles that of FIG. 2. The only significant difference lies in the fact that the mounting arm 66, which corresponds to the mounting arm 31 of FIG. 2, is not connected by a screw connection to the profile connecting strip 67, but the retaining strip 68 clamps behind upwardly swingable or deformable clamping arms 69 of mounting brackets 70. Since the embodiment of FIG. 8 can be mounted only with the use of mounting brackets, a shielding strip 81 is also provided.

FIGS. 9 and 10 show modified forms of the fastening of the holding arm 66 to the mounting brackets 70. In these figures, instead of a hook 69 which can be bent up, special clamping pieces 71, 72 are provided. In all the embodiments of FIGS. 8 to 10, the profile connecting strip 67 is clamped simultaneously with the retaining strip.

FIG. 11 shows an embodiment which can be mounted, Without special mounting brackets, directly on the masonry. The profile connecting strip 73 is designed similarly to the previously-described embodiments and is provided with clamping dogs 74 and a rain backwashpreventing profile 75. The retaining strip 76, which has a corresponding clamping dog 77, can be clamped by its lower end into the profile connecting strip.

In the embodiment of FIG. 12, the retaining strip 78 is shaped similar to the retaining strip of FIG. 11. The profile strip 79 is, by contrast, very much simplified and requires the presence of mounting brackets 80 and a shielding strip 81.

In the embodiment of FIG. 13, two exactly similar retaining strips 82 and 83 are provided, so that this embodiment very largely resembles that of FIG. 6. A separate profile is on this occasion superfluous. Instead, mounting brackets 84 have to be provided; these can however, be of a form similar to a continuous profile connecting strip.

The constructional form of FIG. 14 comprises a profile connecting strip 85 having a rain backwash-preventing profile 86 and into which a retaining strip 87 can be clamped. As in all the other exemplified embodiments, the corresponding parts of profile connecting strip and the retaining strip impart, to the roof skin or flashing, such a curvature that it cannot pull out. The curvature should, in any case, be at least once of return bend or reverse bend shape for only thus is a secure retention guaranteed, without it being necessary to damage the roof skin by use of fasteners or to clamp it so securely that it has no possibility of lateral movement.

What I claim is:

1. In attaching means for connecting an upturned edge portion of roof covering on a flat roof to the upright face of a wall adjacent to and above the roof, a profile connecting strip having a portion projecting outwardly from the wall upright face and masking web means projecting downwardly from said outwardly projecting portion, forming a downwardly-opening groove between the wall upright face and said masking web means, means supporting said profile connecting strip from the wall, platelike retaining means including one edgewise upright plate portion projecting edgewise upwardly within a fold of the roof covering into such downwardly-opening groove and a second edgewise upright plate portion projecting edgewise downwardly within another fold of the roof covering for retaining the upturned roof covering edge portion relative to the profile connecting strip, and means beneath said platelike retaining means supporting the same in such roof covering retaining position.

2. In the attaching means defined in claim 1, mounting brackets for mounting the profile connecting strip on the wall spaced from the wall upright face.

3. In the attaching means defined in claim 2, a shielding strip carried by the mounting brackets and having a surface inclined first upwardly and outwardly away from the wall and then downwardly and outwardly away from the wall forming a rain backwash-preventing profile.

4. In the attaching means defined in claim 1, the outwardly projecting portion of the profile connecting strip in cluding a portion extending first upwardly and outwardly away from the wall upright face and then downwardly and outwardly therefrom, to constitute a rain backwashpreventing profile.

5. In the attaching means defined in claim 1, the means beneath the platelike retaining means including detent means carried by the profile connecting strip for locating the retaining means.

6. In the attaching means defined in claim 1, the profile connecting strip being of generally channel cross section having a main web disposable generally parallel to the wall upright face and a lower flange projecting outwardly from the wall upright face, and the platelike retaining means having a width greater than the minimum spacing between the masking web means and said lower flange.

References Cited UNITED STATES PATENTS 2,219,992 10/1940 Hanson 5260 3,241,272 3/1966 Edwards 5297X 3,277,618 10/1966 Smith 5297X 3,365,847 1/1968 Josek 52-94 3,381,425 5/1968 Gobel 526OX 3,410,038 11/1968 Gobel 5262 3,444,658 5/1969 Gobel 526OX 3,241,271 3/1966 Berg 5258 3,473,276 10/1969 Back et al. 5297X FRANK L. ABBOTT, Primary Examiner S. D. BURKE, Assistant Examiner U.S. Cl. X.R. 

